Finding the Fourth Proportional to 1,856.10, 2,561.50 and 1,227.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.10 : 2,561.50 = 1,227.18 : x
2. Step 2: Convert to fraction form
   1,856.10/2,561.50 = 1,227.18/x
3. Step 3: Cross multiply
   1,856.10x = 2,561.50 × 1,227.18
4. Step 4: Simplify right side
   1,856.10x = 3,143,421.57
5. Step 5: Solve for x
   x = 3,143,421.57/1,856.10
6. Step 6: Final answer
   x = 1,693.56